A critical inventory of the family Amaranthaceae s. str. in Saudi Arabia Author Hassan, Walaa A. 0000-0001-7605-9058 Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt & azmeyw @ gmail. com; https: // orcid. org / 0000 - 0001 - 7605 - 9058 azmeyw@gmail.com Author Al-Shaye, Najla A. 0000-0002-0447-8613 Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia & naaalshaye @ pnu. edu. sa; https: // orcid. org / 0000 - 0002 - 0447 - 8613 naaalshaye@pnu.edu.sa Author Iamonico, Duilio 0000-0001-5491-7568 Department of Environmental Biology, Univeristy of Rome Sapienza, 00185 Rome, Italy & duilio. iamonico @ uniroma 1. it; https: // orcid. org / 0000 - 0001 - 5491 - 7568 duilio.iamonico@uniroma1.it text Phytotaxa 2023 2023-11-28 626 4 223 246 https://phytotaxa.mapress.com/pt/article/download/phytotaxa.626.4.1/51316 journal article 279797 10.11646/phytotaxa.626.4.1 8ad15f0c-26be-49d2-8e77-4a31b70c2a80 1179-3163 10212988 3.1. Alternanthera bettzickiana (Regel) G.Nicholson, Ill. Dict. Gard. 1: 59. 1884 ≡ Telanthera bettzickiana Regel , Index Seminum (LE, Petropolitanus): 28. 1862. Lectotype (designated here): — Ex horto bot. Petropolitano, s.d. , Regel 619 (LE00012018!, image of the lectotype available at https:// plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.le00012018?loggedin=true). Typification of the name Telanthera bettzickiana : Regel (1862a: 28) validly published Telanthera bettzickiana by a detailed description; a doubtful provenance (“Patria Brasilia (?)”) was also given, as well as (“Rgl.”) which means that Regel collected at least one specimen ( syntype according to the Art . 9.6 of ICN). Note that the same description was published few months later than Regel’s Index Seminum (may vs. january) by Regel himself in the volume no. 11 of his Gartenflora ( Regel 1862b: 178 ). There is a specimen at LE ( LE00012018 ), where Regel’s herbarium and types are mainly preserved (HUH Index of Botanists 2013a), bearing two branches of a plant with flowers and leaves, labelled “Ex horto bot. Petropolitano 619 | Telanthera Bettzickiana | Rgl [Regel] ”. This specimen, which matches Regel’s original description, is here designated as the lectotype of the name Telanthera bettzickiana . Alien status:― Neophyte, native to South America ( POWO 2023 ); it can be considered as casual in Saudi Arabia [see Miller & Cope (1996) who stated that it was “only collected once in Arabia ”]. Occurrence in Saudi Arabia :― POWO (2023) reports Alternanthera bettzickiana for Saudi Arabia , but no pertinent literature is cited; the only reference to the Arabian Peninsula is that by Patzelt et al. (2020: 427) who, however, refers to the sultanate of Oman (Western Hajar Mountains, Misfat Al Abriyyin). The species was not recorded by Chaudhary (1998) . We traced only two references in which this species was reported, viz. Al-Eisawi & Al-Ruzayza (2015) and Miller & Cope (1996) , both at Makkah . No specimen was traced by us.